Table 41.
Summary of recent achievements in the field of graphene-based geometric diodes for THz rectennas.
| Diode Configuration | Nanoantenna | Operating Frequency (THz) |
Maximum Responsivity (V−1) |
Zero-Bias Responsivity (V−1) |
Zero-Bias Resistance (Ω) |
|---|---|---|---|---|---|
| Exfoliated monolayer graphene-based arrowhead-shaped diode [234] | metal bowtie 15 nm Cr/40 nm Au | 28.3 | 0.2 for VDS = 1.5 V | 0.18 for VDS = 0 V | 13 K |
| Exfoliated monolayer graphene-based arrowhead-shaped diode [235] | metal bowtie 15 nm Cr/40 nm Au | Up to 160 | 0.8 for VDS = 0.4 V | 0.3 for VDS = 0 V | 19 K |
| Exfoliated monolayer graphene-based arrowhead-shaped diode [236] | metal bowtie 15 nm Cr/40 nm Au | 28.3 | 0.2 for VDS (V) = 1.4 V | 0.12 for VDS = 0 V | 3 K |
| (CVD) monolayer graphene-based arrowhead-shaped diode [237] | metal bowtie Ti (10 nm)/Au (40 nm) | 28.3 | 0.3 for VDS (V) = 0.5 V | 0.1 for VDS (V) = 0 V | 5 K |
| Z-shaped graphene geometric diodes [233] | - | 28.3 | 2.4 for V0 (V) = 0.5 V | - | - |